Unit 3: Real Number Systems & Number Theory TEST REVIEW

What are all prime numbers divisible by?

• 1, 2, and itself
• 1 and itself
• Every number from 1-10
• They aren't divisable at all

Tags

CCSS.4.OA.B.4

Prime numbers have:

• Exactly 2 factors
• 2 pairs of factors
• More than 2 factors
• 1 factor

Tags

CCSS.4.OA.B.4

Composite numbers:

• Are always bigger than prime numbers
• Have more than 2 factors
• Have 2 pairs of factors
• Don't have factors

Tags

CCSS.4.OA.B.4

Which number is NOT a factor of 10?

• 1
• 2
• 3
• 5

Tags

CCSS.4.OA.B.4

Which is a prime number?

• 15
• 17
• 21
• 39

Tags

CCSS.4.OA.B.4

Is 100 a prime or composite number?

• Prime
• Composite

Tags

CCSS.4.OA.B.4

Which of the following numbers shows all of the factors of 12?

• 1,2,3,4,6,12
• 1,2,3,4,6,8,12
• 1,2,4,6,12
• 2,4,6,8,10,12

Tags

CCSS.4.OA.B.4

What is a factor?

• "Factors" are the numbers you multiply to get another number. For instance, factors of 15 are 3 and 5, because 3×5 = 15

• A factor is a number written in word form

• "Factors" tell you facts about all the numbers in the world

Tags

CCSS.4.OA.B.4

Which of the following is a factor of 54?

• 4
• 7
• 5
• 9

Tags

CCSS.4.OA.B.4

Is 33 a prime or composite number?

• Prime
• Composite

Tags

CCSS.4.OA.B.4